河北石湖金矿床101-4矿体构造叠加晕特征及找矿预测

Structural superimposed halo characteristics of 101-4 ore body and prospecting prediction in Shihu Gold Deposit,Hebei Province

针对石湖金矿床101-4矿体,通过在180 m中段以下坑道采集构造叠加晕样品,分析矿体深部地球化学元素组合特征。结果显示:As、Sb、Hg为典型头晕指示元素,Au、Ag、Cu、Pb为典型近矿晕指示元素,Mo、Co、Bi为典型尾晕指示元素;矿体轴向分带具有明显反分带特征,表明成矿、成晕特征具有明显叠加现象;101-4矿体具有近矿晕强烈且分布范围大、连续特征,头尾晕相对较弱且分布范围略小、连续性较差,具有头尾晕叠加特征,结合头尾晕元素比值地球化学参数向深部具有先降低后升高的趋势,利用构造叠加晕找矿预测准则进行深部找矿预测,圈定了3处预测靶区。

In the case study of 101-4 ore body of Shihu Gold Deposit,the structural superimposed halo research samples in the roadways below 180 m level are collected and the deep geochemical element combination characteristics of the ore body are analyzed.The results show that As,Sb,Hg are typical head halo indicator elements,Au,Ag,Cu,Pb are typical near-ore halo indicator elements,Mo,Co,Bi are typical tail halo indicator elements;ore body axial zoning shows obvious reverse zoning characteristics,indicating that the metallogenic and halo-forming characteristics exhibit obvious superimposition;the 101-4 ore body has the characteristics of near-ore halo,intense,large and continuous in distribution,while the head and tail halos are relatively weak and small and poorly continuous in distribution.The head and tail halos have superimposition features.Based on the tendency that the geochemical parameter of head and tail halo element ratio decreases in the deep before rises,deep prospecting prediction is made using the blind ore prediction criteria of structural superimposed halo,and 3 prediction target areas are delineated.